I find that with DXO one is forced to use more control points because its selection isn’t as well defined as what I was used to in Capture NX2 (where Control points were born). In DXO the selection radiates too much from the middle of the control point and too little according to what it is placed on. To get some control over the selection you then often have to place multiple control points and the negatives. Even then it seldom works as well as it was in Capture NX2.
Here is a comparison I posted some time ago. Dunno if its changed since v4.